win32 copy fallback! closes #118

Author: dschep

lib/link.js

@@ -43,6 +43,10 @@ function linkRequirements() {
         try {
           linkDest = fse.readlinkSync(`./${file}`);
         } catch (e) {
+          if (e.code === 'EPERM' && process.platform !== 'win32')
+            fse.copySync(`${requirementsDir}/${file}`, `./${file}`);
+          else
+            throw e;
         }
         if (linkDest !== `${requirementsDir}/${file}`)
           throw exception;